Radar – As of now, all this does is download and save an image for the local radar from Weather Underground. I’m currently editing a GIMP script which will automatically crop and edit the picture to display properly upon download. What you see here is the intended look. It also displays the current temperature.

Time and Game Type – Display current time and date.

Blue Score and Red Score – Display current CPU and RAM usage.

Player Callsigns – These behave just like my TweetScanner skin.

Battlerifle Ammo Count – Displays current battery status; it displays 0 in this picture because I’m using my desktop which is not on a battery.

Also, if you’re into Twitter, you can follow the guy to track the desktop’s evolution, or merely keep track of the hashtag, #HaloHUD.